Pulse or digital communications – Repeaters – Testing
Patent
1991-10-31
1994-02-08
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375121, H04L 2700
Patent
active
052854787
ABSTRACT:
A communication system is provided in which a transmitter performs modulation upon a number sequence to be transmitted. The modulation scheme includes embedding a sequence of numbers into a waveform such that the sequence is present in the waveform on multiple time scales. The transmitted waveform has a selected number of different frequency bands of successively doubling bandwidths. Each of the frequency bands includes the sequence of numbers, repeated therein at a certain rate. The rate is directly proportional to the bandwidth of the frequency band. The communication system further includes a receiver designed to average the value of the repeated sequence as received by the receiver. This scheme allows for accurate communication over noisy, uncertain, and/or hostile channels in both point to point and broadcast communication applications.
REFERENCES:
patent: 4142155 (1979-02-01), Adachi
patent: 4206320 (1980-06-01), Keasler et al.
patent: 4601046 (1986-07-01), Halpern et al.
patent: 4641318 (1987-02-01), Addeo
patent: 4802190 (1989-01-01), Schouhamer Immink
patent: 4941193 (1990-07-01), Barnsley et al.
John A. C. Bingham, "Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come", May, 1990, IEEE Communications Magazine, pp. 5-14.
Oppenheim Alan V.
Wornell Gregory W.
Chin Stephen
Massachusetts Institute of Technology
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